Question

plz solve 8 and 9 questions ​

Answer 1

Step-by-step explanation:

8) area of rectangle =length*breadth

breadth=x and length= 2/3x

$area = \frac{2}{3} {x}^{2}$

7)2x²

Answer 2

SOLUTION

Given,

Present number of bacteria in a culture x .

We know that "square of a number' means multiplying a number two times.

Number of bacteria after one week = square the number of bacteria at present

square of x

= x × x

= x^2

Number of bacteria after one week square of number of bacteria after one week.

square of X^2

= X^2 × X^2

=X × X × X × X

= X^4.